Non-linear dielectric spectroscopy for detecting and evaluating structure-property relations in a P(VDF-TrFE-CFE) relaxor-ferroelectric terpolymer
- Non-linear dielectric spectroscopy (NLDS) is employed as an effective tool to study relaxation processes and phase transitions of a poly(vinylidenefluoride-trifluoroethylene-chlorofluoroethylene) (P(VDF-TrFE-CFE)) relaxor-ferroelectric (R-F) terpolymer in detail. Measurements of the non-linear dielectric permittivity epsilon 2 ' reveal peaks at 30 and 80 degrees C that cannot be identified in conventional dielectric spectroscopy. By combining the results from NLDS experiments with those from other techniques such as thermally stimulated depolarization and dielectric-hysteresis studies, it is possible to explain the processes behind the additional peaks. The former peak, which is associated with the mid-temperature transition, is found in all other vinylidene fluoride-based polymers and may help to understand the non-zero epsilon 2 ' values that are detected on the paraelectric phase of the terpolymer. The latter peak can also be observed during cooling of P(VDF-TrFE) copolymer samples at 100 degrees C and is due to conduction andNon-linear dielectric spectroscopy (NLDS) is employed as an effective tool to study relaxation processes and phase transitions of a poly(vinylidenefluoride-trifluoroethylene-chlorofluoroethylene) (P(VDF-TrFE-CFE)) relaxor-ferroelectric (R-F) terpolymer in detail. Measurements of the non-linear dielectric permittivity epsilon 2 ' reveal peaks at 30 and 80 degrees C that cannot be identified in conventional dielectric spectroscopy. By combining the results from NLDS experiments with those from other techniques such as thermally stimulated depolarization and dielectric-hysteresis studies, it is possible to explain the processes behind the additional peaks. The former peak, which is associated with the mid-temperature transition, is found in all other vinylidene fluoride-based polymers and may help to understand the non-zero epsilon 2 ' values that are detected on the paraelectric phase of the terpolymer. The latter peak can also be observed during cooling of P(VDF-TrFE) copolymer samples at 100 degrees C and is due to conduction and space-charge polarization as a result of the accumulation of real charges at the electrode-sample interface.…
| Author details: | Thulasinath Raman VenkatesanORCiDGND, David SmykallaORCiDGND, Bernd PlossORCiDGND, Michael WübbenhorstORCiDGND, Reimund GerhardORCiDGND |
|---|---|
| DOI: | https://doi.org/10.1007/s00339-021-04876-0 |
| ISSN: | 0947-8396 |
| ISSN: | 1432-0630 |
| Title of parent work (English): | Applied physics : A, Materials science & processing |
| Publisher: | Springer |
| Place of publishing: | Berlin ; Heidelberg ; New York |
| Publication type: | Article |
| Language: | English |
| Date of first publication: | 2021/10/11 |
| Publication year: | 2021 |
| Release date: | 2024/03/11 |
| Tag: | Curie-transition; Dielectric hysteresis; Mid-temperature transition; Non-linear dielectric spectroscopy; P(VDF-TrFE-CFE); Relaxor-ferroelectric polymer |
| Volume: | 127 |
| Issue: | 10 |
| Article number: | 756 |
| Number of pages: | 10 |
| Funding institution: | Projekt DEAL |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| DDC classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Peer review: | Referiert |
| Publishing method: | Open Access / Hybrid Open-Access |
| License (German): |  CC-BY - Namensnennung 4.0 International |
